I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
caroach caroch caroche carroch crotch crouch currach curch carritch creche crutch grouch cratch grouchy crash crush creesh garish grutch currish kerchoo
roach broach caroach caroche soroche caroch orache huaracho grouch huarache crouch earache cratch brooch breach broche brach birrotch rotch reach ratch carroch crotch currach orach preach troche